Product Description
Woodward DECS-100-B15 Digital Excitation Control System
Product Overview
- The Woodward DECS-100-B15 is a Digital Excitation Control System designed for precise voltage regulation and excitation control of synchronous generators in power generation applications, such as industrial power plants, marine systems, and backup generators. This microprocessor-based control unit provides automatic voltage regulation, reactive power control, and protection features, making it suitable for small to medium-sized generator sets. The DECS-100-B15 offers robust performance with a compact design, integrating seamlessly with generator systems to ensure stable operation under varying load conditions. Compared to other Woodward excitation systems like the DECS-200 or DECS-250, the DECS-100-B15 is a cost-effective solution with simpler functionality tailored for less complex applications. It is distinct from Woodward’s genset controllers (e.g., EasyGen-3500-5, 8440-2087), electronic governors (e.g., 8406-121), and actuators (e.g., 8408-921), focusing specifically on generator excitation control.
Technical Specifications
- The DECS-100-B15 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | DECS-100-B15 |
| Manufacturer | Woodward |
| Description | Digital Excitation Control System for Synchronous Generators |
| Series | DECS-100 |
| Function | Regulates generator voltage, controls excitation, and provides protection |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 4–8 MB (for firmware and configuration) RAM: 2–4 MB (for runtime data) |
| Display | None (configuration via PC interface or external HMI) |
| Inputs | 3-phase voltage sensing (up to 600 VAC) 3-phase current sensing (1 A or 5 A CTs) 2 analog inputs (4–20 mA or 0–10 V) 4 discrete inputs (24 VDC) |
| Outputs | 1 excitation output (up to 63 VDC at 7 A continuous, 15 A forcing for 10 s) 2 analog outputs (4–20 mA) 3 relay outputs (dry contact, up to 250 VAC/5 A) |
| Communication Interfaces | 1 serial port (RS-485, Modbus RTU) CANbus (optional, for integration with engine controls) |
| Control Modes | Automatic Voltage Regulation (AVR), Power Factor (PF) control, Reactive Power (VAR) control, Manual excitation control |
| Regulation Accuracy | ±0.25% of nominal voltage (steady-state) |
| Protection Features | Overexcitation, underexcitation, overvoltage, undervoltage, loss of sensing, field overcurrent |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 100 events), status LEDs |
| Compatibility | Compatible with brushless or static exciters; integrates with Woodward genset controllers (e.g., EasyGen series), SCADA systems, and third-party devices via Modbus |
| Power Supply | 12–36 VDC (24 VDC nominal) or 120–240 VAC (50/60 Hz) |
| Power Consumption | Approx. 15–25 W |
| Environmental Specifications | Operating Temperature: -40°C to +70°C (-40°F to +158°F) Storage Temperature: -40°C to +85°C (-40°F to +185°F) Relative Humidity: 5% to 95% non-condensing Vibration: IEC 60068-2-6 compliant Shock: IEC 60068-2-27 compliant |
| Enclosure | IP20 (panel-mounted, higher IP ratings with enclosures) |
| Dimensions | Approx. 233 mm (H) x 144 mm (W) x 72 mm (D) |
| Weight | Approx. 1–2 kg |
| Mounting | Panel or DIN rail |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, configuration-dependent) |